87806328 ÷ 878 
The aim is to understand the frequency of 878 in 87806328.

Step 1:
The number 878 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 878

Step 2:
87 divided by 878 is 0 with a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 87, we get 87.
Bring next digit (8) of the dividend behind the 87 and repeat the process: 878 / 878

Going ahead to step 3:
The number 878 fits into 878 1 times, leaving a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 878 from 878 and we're left with 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 878

On to step 4:
878 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 0 after subtracting 0 from 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 878

Step 5:
If we divide 6 by 878, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 100.0
If we subtract 0 from 6, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 878

Step 6:
The number 878 fits into 63 0 times, leaving a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 1000.0
If we take 0 away from 63, we end up with 63.
Fetch the next digit (2) from the dividend, attach it to 63 and continue: 632 / 878

On to step 7:
878 can be fit into 632 0 times, resulting in a remainder of 632.
Write down 0 as next digit of the result. 
Result so far: 10000.0
Subtracting 0 from 632 leaves us with 632.
Include the next digit (8) from the dividend after 632, then repeat: 6328 / 878

Let's proceed to step 8:
878 can be fit into 6328 7 times, resulting in a remainder of 182.
Put 7 as the next digit of the answer. 
Result so far: 100007.0
If we take 6146 away from 6328, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Going ahead to step 9:
878 can be fit into 1820 2 times, resulting in a remainder of 64.
The next digit of our result is 2. 
Result so far: 100007.2
Subtract 1756 from 1820 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 10:
878 can be fit into 640 0 times, resulting in a remainder of 640.
Write down 0 as next digit of the result. 
Result so far: 100007.2
Subtract 0 from 640 to get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 11:
When dividing 6400 by 878, we get 7 with a remainder of 254.
Record the quotient 7 as the next digit in the result. 
Result so far: 100007.207
Subtracting 6146 from 6400 leaves us with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Moving on to step 12:
878 can be fit into 2540 2 times, resulting in a remainder of 784.
The next digit of our result is 2. 
Result so far: 100007.2072
Deduct 1756 from 2540 and we're left with 784.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7840, and continue the process.

Going ahead to step 13:
878 goes into 7840 8 times with a remainder of 816.
Use 8 as the next digit of our solution. 
Result so far: 100007.20728
If we take 7024 away from 7840, we end up with 816.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8160, and continue the process.

Let's proceed to step 14:
878 goes into 8160 9 times with a remainder of 258.
The number 9 becomes the next digit in our result. 
Result so far: 100007.207289
If we subtract 7902 from 8160, we get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Step 15:
When dividing 2580 by 878, we get 2 with a remainder of 824.
Put 2 as the next digit of the answer. 
Result so far: 100007.2072892
Subtract 1756 from 2580 to get 824.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

Moving on to step 16:
878 goes into 8240 9 times with a remainder of 338.
Write down 9 as next digit of the result. 
Result so far: 100007.20728929
If we subtract 7902 from 8240, we get 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

After the division, we end up with 100007.20728929 and a remainder of 3.38e-07.